MODEL keyword <overlay n> <range . . .>
or
load filename
This command associates a constitutive model with specified zones in the grid. If a range is given, then the model is associated with only those zones within the range. If no range is specified, then the model is associated with the entire grid.
During the calculation, zones will behave according to a constitutive model corresponding to one of the keywords given below. (The mechanical constitutive models are described in Section 2 in Theory and Background, the creep models in Section 2 in Optional Features, the thermal models in Section 1 in Optional Features and the fluid flow models in Section 1 in Fluid-Mechanical Interaction. All are to be found in the FLAC3D Manual).
The optional keyword overlay assigns either two overlaid sets of five constant-strain tetrahedral elements to each zone (n = 2), or one set of five tetrahedral elements to each zone (n = 1). The default is set to double-overlaid elements (n = 2).
The keyword load loads a DLL version of a constitutive model, identified by filename. Once loaded, the DLL model can be assigned to zones in the grid using the MODEL command and range keywords. See Section 4 in Optional Features (FLAC3D Manual) for a guide to creating user-defined models as DLLs. MODEL load can only be applied if CONFIG cppudm is invoked.
anisotropic transversely isotropic elastic model
cam-clay modified Cam-clay plasticity model
doubleyield double-yield (cap) plasticity model
drucker Drucker-Prager plasticity model
elastic isotropic elastic model
finn dynamic pore-pressure generation model (available only for the dynamic option)hoekbrown generalized Hoek-Brown model
mohr Mohr-Coulomb plasticity model
null null model
orthotropic orthotropic elastic model
ssoftening strain-hardening/softening plasticity model
subiquitous bilinear strain-hardening/softening ubiquitous-joint plasticity model
ubiquitous ubiquitous-joint model
(available only for creep model option)
burger Burger's substance viscoelastic model
cpower power-law viscoplastic model
cvisc Burger-creep viscoplastic model
cwipp crushed-salt constitutive model
power two-component power law
pwipp WIPP-creep viscoplastic model
viscous classical viscoelastic model
wipp WIPP reference creep formulation
fl_anisotropic anisotropic fluid flow
fl_isotropic isotropic fluid flow
fl_null null flow model. Null zones model impermeable material. Note that, for the coupled fluid-flow mechanical process, if zones are nulled mechanically, they must also be nulled for fluid flow (default).
(available only for thermal model option)
th_ac isotropic advection-conduction
th_anisotropic anisotropic thermal conductivity
th_isotropic isotropic heat conduction
th_null null thermal model. Null zones model excavated material and insulators. Note that zones made null mechanically are not automatically made null thermally.
